<template>
  <view v-if="goods_info.goods_name" class="goods-detail-container">
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
      <swiper-item v-for="(item, i) in goods_info.pics" :key="i">
          <image :src="item.pics_big" @click="preview(i)"></image>
      </swiper-item>
    </swiper>
    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品价格 -->
      <view class="price">￥{{goods_info.goods_price}}</view>
      <!-- 信息主体区域 -->
      <view class="goods-info-body">
        <!-- 商品名称 -->
        <view class="goods-name">{{goods_info.goods_name}}</view>
        <!-- 收藏 -->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">快递：免运费</view>
    </view>
    <!-- 商品详情信息 -->
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    
    <!-- 商品导航组件区域 -->
    <view class="goods_nav">
      <uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick" @buttonClick="buttonClick" />
    </view>
  </view>
  
</template>

<script>
  import {mapState, mapMutations,mapGetters } from 'vuex'
  
   export default { 
    data(){
      return{
          // 商品详情对象
          goods_info: {},
          // 左侧按钮组的配置对象
          options: [{
            icon: 'shop',
            text: '店铺'
          }, {
            icon: 'cart',
            text: '购物车',
            info: 2
          }],
          // 右侧按钮组的配置对象
          buttonGroup: [{
              text: '加入购物车',
              backgroundColor:'#ff0000',
              color: '#fff'
            },
            {
              text: '立即购买',
              backgroundColor:'#ffa200',
              color: '#fff'
            }
          ]
      }
    },
    computed:{
      ...mapState('m_cart', []),
      ...mapState('m_cart',['total'])
    },
    onLoad(options){
      //获取商品ID
      const goods_id = options.goods_id
      //调用请求商品详情数据方法
      this.getGoodsDetail(goods_id)
    },
    methods:{
      ...mapMutations('m_cart', ['addToCart']),
      async getGoodsDetail(goods_id){
        const {data:res} = await uni.$http.get('/api/public/v1/goods/detail',{goods_id})
        //console.log("========0==="+JSON.stringify(res)+"=====================")
        if(res.meta.status !==200) return uni.$showMsg()
        // 使用字符串的 replace() 方法，将 webp 的后缀名替换为 jpg 的后缀名
        res.message.goods_introduce=res.message.goods_introduce.replace(/<img /g, '<img style="display:block;"').replace(/webp/g, 'jpg')
        //console.log("=======1===="+JSON.stringify(res)+"=====================")
        this.goods_info = res.message
      },
      // 实现轮播图的预览效果
      preview(i) {
        // 调用 uni.previewImage() 方法预览图片
        uni.previewImage({
          // 预览时，默认显示图片的索引
          current: i,
          // 所有图片 url 地址的数组
          urls: this.goods_info.pics.map(x => x.pics_big)
        })
      },
      onClick(e){
        console.log(e)
        if(e.content.text==='购物车'){
          //切换到购物车页面
          uni.switchTab({
            url: '/pages/cart/cart'
          })
        }
      },
      buttonClick(e){
        console.log(e)
        //1.判断是否点击加入了购物车按钮
        if(e.content.text === '加入购物车'){
          //2.组织一个商品信息对象
          const goods = {
            goods_id: this.goods_info.goods_id,
            goods_name: this.goods_info.goods_name,
            goods_price: this.goods_info.goods_price,
            goods_count: 1,
            goods_small_logo: this.goods_info.goods_small_logo,
            goods_state: true
          }
          this.addToCart(goods)
        }
      }
    },
    watch:{
      total:{
        handler(newVal){
          const findResult = this.options.find(x=>x.text==='购物车')
          if(findResult){
            findResult.info = newVal
          }
        },
        //immediate 属性用来声明此侦听器，是否在页面初始加载后立即调用
        immediate: true
      }
    }
  }
</script>

<style lang="scss">
  swiper {
    height: 750rpx;
  
    image {
      width: 100%;
      height: 100%;
    }
  }
  // 商品信息区域的样式
  .goods-info-box {
    padding: 10px;
    padding-right: 0;
  
    .price {
      color: #c00000;
      font-size: 18px;
      margin: 10px 0;
    }
  
    .goods-info-body {
      display: flex;
      justify-content: space-between;
  
      .goods-name {
        font-size: 13px;
        padding-right: 10px;
      }
      // 收藏区域
      .favi {
        width: 120px;
        font-size: 12px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        border-left: 1px solid #efefef;
        color: gray;
      }
    }
  
    // 运费
    .yf {
      margin: 10px 0;
      font-size: 12px;
      color: gray;
    }
  }
  .goods-detail-container {
    // 给页面外层的容器，添加 50px 的内padding，
    // 防止页面内容被底部的商品导航组件遮盖
    padding-bottom: 50px;
  }
  
  .goods_nav {
    // 为商品导航组件添加固定定位
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
  }
</style>
